Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: Rifai on 10 August 2014, 05:36:00
-
Hello,
I have Opel Omega B 2.5 CD 1997 X25XE / 170hp
can any one please tell me the original wheel size that comes on it? I know it's 15" but I need to know the wheel width and ET.
the car came with 7j 18" ET45 aftermarket rings with spacer, I believe it's not the right the size for my car and it's affecting the car performance especially when taking off.
I know 7j 16" will fit OK on my car but I couldn't find that size in my country.
will a 17" 7.5j ET39 (the omega 2003 rims) fit on my car? will there be any issues especially with the wheel width 7.5j ?
I appreciate your advice on the matter and sharing your personal experience.
-
The rims from a 2003 Omega will be a perfect fit :y
-
opel omega 97 original size is 195/65-15.. wheel pcd 5x110 et 35-45 bore 65.1
you can safely use any wheel that have 5x110 pcd.. 16-17 sizes are ok for omega.. but you must keep tyre height ratio as small as possible if you want better acceleration.. I'm currently using 225/45-17 wheels 8J
-
Thank you Taxi Al ;)
opel omega 97 original size is 195/65-15.. wheel pcd 5x110 et 35-45 bore 65.1
you can safely use any wheel that have 5x110 pcd.. 16-17 sizes are ok for omega.. but you must keep tyre height ratio as small as possible if you want better acceleration.. I'm currently using 225/45-17 wheels 8J
I was worried about the rims width 75mm(7.5J) . I am planning on fitting 225/50/17 tyres, I am currently using 235/40/18
I assume you are using the same car as mine, do you have issues with car acceleration? I do with my 18" rims :(
-
Thank you Taxi Al ;)
opel omega 97 original size is 195/65-15.. wheel pcd 5x110 et 35-45 bore 65.1
you can safely use any wheel that have 5x110 pcd.. 16-17 sizes are ok for omega.. but you must keep tyre height ratio as small as possible if you want better acceleration.. I'm currently using 225/45-17 wheels 8J
I was worried about the rims width 75mm(7.5J) . I am planning on fitting 225/50/17 tyres, I am currently using 235/40/18
I assume you are using the same car as mine, do you have issues with car acceleration? I do with my 18" rims :(
if you use tire size calculators you will see your current tire is better for acceleration 235/40-18 >2026.96 mm circumference vs 225/50-17 >2063.4
imo 225/50-17 is too big
-
Standard Omega 17"s run 235/45/17 tyres regardless of what ANYONE else tries to tell you :y
-
Standard Omega 17"s run 235/45/17 tyres regardless of what ANYONE else tries to tell you :y
??? >:(
you know what.. this info is publicly available in million sites :D and also not the standard size for 97 ;D
very helpful post :)
-
Cem the Ops car has non standard wheels on it.
He knows this and wishes to change them.
He can readily get a set of 17" wheels from a 2003 car.
These will have 235/45/17 tyres.
Those are the facts. :-*
-
Cem the Ops car has non standard wheels on it.
He knows this and wishes to change them.
He can readily get a set of 17" wheels from a 2003 car.
These will have 235/45/17 tyres.
Those are the facts. :-*
first this car is not an 2003 car
second I already told the standard size
third your post is aiming at me and tell the op to ignore >:(
these are the real facts! >:( >:( >:(
if you want respect , first you behave like that!
and congrats to you , as you turned a simple help tread to a slanging match >:(
-
Part of the question was whether the 17" wheels from a later car would fit.
The only answer to this question is yes. Even 2003 cars have a 15" steel spare as standard.
So to repeat, yes a 2003 factory wheel will fit perfectly, and it will require a 235/45/17 tyre.
-
Part of the question was whether the 17" wheels from a later car would fit.
The only answer to this question is yes. Even 2003 cars have a 15" steel spare as standard.
So to repeat, yes a 2003 factory wheel will fit perfectly, and it will require a 235/45/17 tyre.
was it a part of question "whose answers I will ignore" ? >:(
-
To answer another part of the Ops question...
Your 18" wheels ideally need a 12 or 15mm spacer, and should have either 235/40/18 or 245/40/18 tyres fitted.
This would then make them the equivalent offsett/tyre fitment to the factory approved Irmscher 18" wheels which had either an ET30 or ET33 for the Omega fitment :y
-
To answer another part of the Ops question...
Your 18" wheels ideally need a 12 or 15mm spacer, and should have either 235/40/18 or 245/40/18 tyres fitted.
This would then make them the equivalent offsett/tyre fitment to the factory approved Irmscher 18" wheels which had either an ET30 or ET33 for the Omega fitment :y
you didnt answer my question >:(
-
OK guys I really don't want you arguing about it. I guess you both are right on different things.
225/50/17 yes are big for my car according to tire size calculator. but I will have to agree with Taxi Al on the 25/45/17 as they have almost the same diameter as the original one(195/65/15)... take a look on result from www.miata.net website:
(http://i59.tinypic.com/2wdn7sh.jpg)
and yes I am using spacer for my 18" rims but not sure if 12 or 15 mm.
my current rims are aftermarket made and one of them I doubt to be bent so the car is not stable when I go over 90km/ph.
whats more I am looking for more comfort ride in my new rims using higher tires(45 or 50) I am having a bad experience with the current ones especially when I go over a road bump. but what concerns me the most is the car acceleration, I tried a 2.0 omega and it's a way better than my 2.5 V6.
I would go for a 16" rims but I couldn't find any around here not even the 15".
And please no need to argue about it, as Cem said it's was just a simple help question.
Many thanks!
-
I wasn't arguing ::)
Anyways, my Irmscher Stila 18" wheels have an offset of ET33, but Irmscher Sportstars have an offset of ET30.
Both are Omega fitments, so whichever spacer you can find more easily will be fine :y
Note, with some tyres you can get away with an offset of ET38 with 8J 18 wheels, but they can rub on the front struts, so aren't recommended...
You will find that 225/55/16 and 245/40/18 are the same rolling radius. 235/45/17 and 235/40/18 are almost the same rolling radius...
Incidentally details of the official factory tyre sizes for the facelift can be found on pages 227 and 228 of the Owners manual, here...
http://www.omegaowners.com/forum/index.php?topic=90477.0
The official 18" tyre sizes come from Irmschers certificate of conformity supplied with the wheels when new :y
Factory wheel/tyre sizes depend on engine size and spec, but all Omega Bs from '94-'03 have 195/65/15 spare wheels as standard.
Facelift cars had the following...
Four cylinder, including diesel...
195/65/15
205/65/15
225/55/16
235/45/17
All V6s...
205/65/15
225/55/16
235/45/17
Pre facelift cars had the following...
All four cylinder...
195/65/15
205/65/15
225/55/16
All v6...
205/65/15
225/55/16
235/45/17 MV6 only, '97-'99.
Hopefully that answers your wheel/tyre questions :y
-
OK guys I really don't want you arguing about it. I guess you both are right on different things.
225/50/17 yes are big for my car according to tire size calculator. but I will have to agree with Taxi Al on the 225/45/17 as they have almost the same diameter as the original one(195/65/15)... take a look on result from www.miata.net (http://www.miata.net) website:
(http://i59.tinypic.com/2wdn7sh.jpg)
and yes I am using spacer for my 18" rims but not sure if 12 or 15 mm.
my current rims are aftermarket made and one of them I doubt to be bent so the car is not stable when I go over 90km/ph.
whats more I am looking for more comfort ride in my new rims using higher tires(45 or 50) I am having a bad experience with the current ones especially when I go over a road bump. but what concerns me the most is the car acceleration, I tried a 2.0 omega and it's a way better than my 2.5 V6.
I would go for a 16" rims but I couldn't find any around here not even the 15".
And please no need to argue about it, as Cem said it's was just a simple help question.
Many thanks!
225/45-17 was told by me :)
I wont go in the long details but if you use a different circumference tire, your speedo will be out (can be corrected via tech 2 with a cost)
and your gearing ratios will be changed effecting acceleration..
-
Apology accepted Cem, as 225/45/17 isn't an Omega tyre size :y
-
I wasn't arguing ::)
Anyways, my Irmscher Stila 18" wheels have an offset of ET33, but Irmscher Sportstars have an offset of ET30.
Both are Omega fitments, so whichever spacer you can find more easily will be fine :y
Note, with some tyres you can get away with an offset of ET38 with 8J 18 wheels, but they can rub on the front struts, so aren't recommended...
You will find that 225/55/16 and 245/40/18 are the same rolling radius. 235/45/17 and 235/40/18 are almost the same rolling radius...
Incidentally details of the official factory tyre sizes for the facelift can be found on pages 227 and 228 of the Owners manual, here...
http://www.omegaowners.com/forum/index.php?topic=90477.0
The official 18" tyre sizes come from Irmschers certificate of conformity supplied with the wheels when new :y
Factory wheel/tyre sizes depend on engine size and spec, but all Omega Bs from '94-'03 have 195/65/15 spare wheels as standard.
Facelift cars had the following...
Four cylinder, including diesel...
195/65/15
205/65/15
225/55/16
235/45/17
All V6s...
205/65/15
225/55/16
235/45/17
Pre facelift cars had the following...
All four cylinder...
195/65/15
205/65/15
225/55/16
All v6...
205/65/15
225/55/16
235/45/17 MV6 only, '97-'99.
Hopefully that answers your wheel/tyre questions :y
the manual doesn't include my engine type X25XE, so i am not really sure about it. 235/45/17 or 225/45/17
based no google search I found out that the new tires should have the same diameter as the original ones 195/65/15 and that leads me to 225/45/17 which have identical diameter, radius and circumference. also based on my information a 225 wide tires should give a better acceleration & smoother steering(correct me if I am wrong).
I really don't want to spend 800 euros on rims and new tires and get the same result as my current 18" wheels :-\
225/45-17 was told by me :)
I wont go in the long details but if you use a different circumference tire, your speedo will be out (can be corrected via tech 2 with a cost)
and your gearing ratios will be changed effecting acceleration..
Oh my apologies, sorry :P.
but I really didn't get the following part:
your speedo will be out (can be corrected via tech 2 with a cost)
-
You can ignore that about the speedo :y
The exact wheel/tyre combo in the manual depends on spec. The manual in the link is the facelift one, but I have listed the prefacelift ones too.
If you run all those tyre sizes listed through the convertor on miata.net you will see whatthe minimal differences of the rolling radii are. Anything below 2% can be ignored as the speedo is only accurate to 10%.
Being a V6 Your car would have left the factory with 205/65/15 tyres fitted, so use that size as your bench mark in the conversion calculator :y
-
Apology accepted Cem, as 225/45/17 isn't an Omega tyre size :y
it has the same circumference with 195/65-15
but 235 45 17 is bigger apparently ::)
-
Apology accepted Cem, as 225/45/17 isn't an Omega tyre size :y
it has the same circumference with 195/65-15
but 235 45 17 is bigger apparently ::)
Thanks man :)
Apology accepted Cem, as 225/45/17 isn't an Omega tyre size :y
it has the same circumference with 195/65-15
but 235 45 17 is bigger apparently ::)
:y :y
-
You can ignore that about the speedo :y
The exact wheel/tyre combo in the manual depends on spec. The manual in the link is the facelift one, but I have listed the prefacelift ones too.
If you run all those tyre sizes listed through the convertor on miata.net you will see whatthe minimal differences of the rolling radii are. Anything below 2% can be ignored as the speedo is only accurate to 10%.
Being a V6 Your car would have left the factory with 205/65/15 tyres fitted, so use that size as your bench mark in the conversion calculator :y
you are absolutely right. thank you so much!! I went back to car manual and yes it was 205/65/15 the 195/65/15 was the spare wheel size.
Now I guess I need 215/50/17 tires and it will be OK.
Thank you All for your help, much appreciated :y :y :y
-
On a 7.5J, 225 may be a shade narrow, 215 will start to look a bit shite. If tyre costs need you to go narrower, consider getting the right rims for that size.
UK insurance companies can be a bit touchy over tyre sizes not approved by the manufacturer, so you may need to declare non standard sizes (usually doesn't bump the premium too much, esp if its an optional extra size_
-
Hello,
I have Opel Omega B 2.5 CD 1997 X25XE / 170hp
can any one please tell me the original wheel size that comes on it? I know it's 15" but I need to know the wheel width and ET.
the car came with 7j 18" ET45 aftermarket rings with spacer, I believe it's not the right the size for my car and it's affecting the car performance especially when taking off.
I know 7j 16" will fit OK on my car but I couldn't find that size in my country.
will a 17" 7.5j ET39 (the omega 2003 rims) fit on my car? will there be any issues especially with the wheel width 7.5j ?
I appreciate your advice on the matter and sharing your personal experience.
Yes they will fit fine.
Re width, the only 235 45 17 tyre I have had a problem with was a Bridgestone potenza 010 with MASSIVE rim protection to the point that they physically will not go on the hub for fouling the shock. With rim protection that much over size those tyres would have potential fitment issues no matter what vehicle they where fitted to. They are not a nice tyre and outdated so don't buy those and you'll be fine. :)
Omega chassis components and body/wheel arch dimensions are the same across the range. So any oe wheel size will fit any omega. :)
-
You can ignore that about the speedo :y
The exact wheel/tyre combo in the manual depends on spec. The manual in the link is the facelift one, but I have listed the prefacelift ones too.
If you run all those tyre sizes listed through the convertor on miata.net you will see whatthe minimal differences of the rolling radii are. Anything below 2% can be ignored as the speedo is only accurate to 10%.
Being a V6 Your car would have left the factory with 205/65/15 tyres fitted, so use that size as your bench mark in the conversion calculator :y
you are absolutely right. thank you so much!! I went back to car manual and yes it was 205/65/15 the 195/65/15 was the spare wheel size.
Now I guess I need 215/50/17 tires and it will be OK.
Thank you All for your help, much appreciated :y :y :y
for your information , opel use 195 size on that year .. for GLS and CD ::)
and also
(http://i181.photobucket.com/albums/x80/mecdv6/tire_sizes_zps900375c4.jpg)
-
Wikipedia or Google? ;D
-
Also, depending on the market, tyre sizes are often on the chassis stickers :y
-
Wikipedia or Google? ;D
cant you see the chart ::)
-
but obviously its not 235 45 17 ::)
-
Third from bottom of the 2.5 list, but table is clearly from your imagination rather than your owners manual ::)
-
Third from bottom of the 2.5 list, but table is clearly from your imagination rather than your owners manual ::)
;D ;D ;D
thanks .. I'm not that quick to prepare a chart like that ;D
-
You can ignore that about the speedo :y
The exact wheel/tyre combo in the manual depends on spec. The manual in the link is the facelift one, but I have listed the prefacelift ones too.
If you run all those tyre sizes listed through the convertor on miata.net you will see whatthe minimal differences of the rolling radii are. Anything below 2% can be ignored as the speedo is only accurate to 10%.
Being a V6 Your car would have left the factory with 205/65/15 tyres fitted, so use that size as your bench mark in the conversion calculator :y
you are absolutely right. thank you so much!! I went back to car manual and yes it was 205/65/15 the 195/65/15 was the spare wheel size.
Now I guess I need 215/50/17 tires and it will be OK.
Thank you All for your help, much appreciated :y :y :y
for your information , opel use 195 size on that year .. for GLS and CD ::)
and also
(http://i181.photobucket.com/albums/x80/mecdv6/tire_sizes_zps900375c4.jpg)
That is correct my car's owner manual shows the same: 195/65/15 for GL and 205/65/15 for CD & MV6
On a 7.5J, 225 may be a shade narrow, 215 will start to look a bit shite. If tyre costs need you to go narrower, consider getting the right rims for that size.
UK insurance companies can be a bit touchy over tyre sizes not approved by the manufacturer, so you may need to declare non standard sizes (usually doesn't bump the premium too much, esp if its an optional extra size_
I know that but I am only stuck with 17" rims as I stated before I couldn't find the 16 neither the 15' wheels. according to tire size calculator 215/50/17 are the best size comparing to the factory ones. see below:
(http://i59.tinypic.com/245ylw3.jpg)
I agree 225 or 215 would be narrow but I don't want risk it as the differences are quite high:
(http://i62.tinypic.com/35isq4h.jpg)
and here is the 235
(http://i61.tinypic.com/2yl3gc6.jpg)
I don't want to buy aftermarket rims because I already suffered with my current ones, I want the original Opel rims.
one final question, do I need a spacer for the 17" rims with ET39?
-
To be clear, the factory 17" rims you intend to fit have have an offset of ET33.
They require a tyre of size 235/45/17, as fitted at the factory.
The rolling radius is irrelevant, as the differences between the various sizes are negligible.
To put that another way, if it were a significant problem, then the factory would have fitted the tyres you suggest. They didn't, therefore, neither should you :y
-
Worth noting also that with 5 revolutions less per mile than the correct 205/65/15 tyre, the 235/45/17 tyres will improve acceleration slightly. Which is nice... (but neglible to the point of irrelevance)
-
Rifai, buy what you want :y
-
To be clear, the factory 17" rims you intend to fit have have an offset of ET33.
They require a tyre of size 235/45/17, as fitted at the factory.
The rolling radius is irrelevant, as the differences between the various sizes are negligible.
To put that another way, if it were a significant problem, then the factory would have fitted the tyres you suggest. They didn't, therefore, neither should you :y
Got it. Thank you dude. much appreciated :)
-
I am now looking at the Ronal Steinmetz 16" rims.... are they worth the money?
they look so nice!
-
I am now looking at the Ronal Steinmetz 16" rims.... are they worth the money?
they look so nice!
If they need painting Cems your man...
-
here they are
http://www.ebay.com/itm/Ronal-Steinmetz-16-Alloy-Wheels-7Jx16H2-ET39-Vauxhall-Corsa-5-Lug-110-PCD-/271509661737
-
Different :y same size/ET as standard 16" rims, so would need 225/55/16 tyres :y
-
Different :y same size/ET as standard 16" rims, so would need 225/55/16 tyres :y
exactly! same as the manual :y
I got really confused with what tires to use for 17" rims. it might seem stupid to some people here but I don't want to spend hundreds or Euros on Bridgestone or Continental new set of tires with wrong size
Thanks buddy
-
For *standard* Omega sizes (195/65/15, 205/65/15, 225/55/16 and 235/45/17), all but the 225/55/16 use the same configs for the instrument, FC etc. The 225/55/16 needs a different config.
Post 1998 cars, the instrument panel is programmable, Pre 1998, it isn't - you have to replace it. Or accept its out.
All FCs are programmable.